package com.wufeng.util;


public class CommonUtils {
    public static void main(String[] args) {
        long a = 21;
        long b = 2l;
        Long c = 21l;
        System.out.println(c instanceof Long);
    }

    /**
     * @param arrlength
     * @return
     */
    public static int[] randomArray(int arrlength){
        int[] array = new int[arrlength];
        for(int index=0;index<arrlength;index++){
            array[index] = (int)(Math.random()*100);
        }
        return array;
    }
}
